What Is the Difference Between a Prescriptive- and a Performance-

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The Answer is Prescriptive- and performance-type code provisions are two different approaches to setting standards for construction and building codes.

A prescriptive code provision specifies the exact materials, methods, and dimensions that must be used in a construction project. This type of provision leaves little room for flexibility and requires strict adherence to the specified requirements. For example, a prescriptive code provision for a fire-resistant wall might specify the exact type and thickness of the fire-resistant material that must be used.

On the other hand, a performance code provision sets out the desired outcome or performance standard that must be achieved, but allows flexibility in how that standard is met. This type of provision gives builders and designers more freedom to choose the materials and methods that best suit their specific project, as long as they can demonstrate that the desired performance standard has been met. For example, a performance code provision for energy efficiency might specify a target level of insulation and air tightness, but leave it up to the builder to determine the best way to achieve that level of performance.

In summary, prescriptive code provisions are more rigid and specific, while performance code provisions are more flexible and focused on achieving a desired outcome. Both approaches have their advantages and disadvantages, and the choice between them often depends on the specific requirements of a project and the preferences of the regulatory authority.

What Is the Difference Between a Prescriptive- and a Performance-

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